====== KA-TP-16-2008 UHECR bounds on Lorentz violation in the photon sector ====== F. R. Klinkhamer (ITP) Plenary talk at the 20-th Rencontre de Blois "Challenges in Particle Astrophysics", May 18-23, 2008 KA-TP-16-2008 erhältlich unter 0807.2147 Download: [[http://arxiv.org/abs/0807.2147|0807.2147]] \\ \\ \\